Window-blind lock



No. '750,730. PATENTED JAN. 26,' 1904.

' W. F. STOUGH.

WINDOW BLIND LOGK.

APPLIGATION I'ILEDAPB. 22, 1903.

NO MODEL.

/I/I/III %vi humbe Patented January 26, 1904.

UNITED STATES PATENT OFFICE.

WILIAM FRANKLIN STOUGH, OF PRATTVILLE, ALABAMA.

WINDOW-BLIND LOCK.

SPECIFICATION forming part of Letters Patent No. 7 50,730, dated January26, 1904.

Application filed April 22, 1903. Serial No. 153,777. No ode To all whomit may concern:

Be it known that I, WILIAM FRANKLIN STOUGH, a citizen of the UnitedStates, residing at Prattville, in the County of Autauga and State ofAlabama, have invented certain new and useful Improvements in Window-Blind Looks, of which the following is a specification.

My invention relates to devices for looking blinds, and has for itsobject to provide a device in which a pivoted catch is concealed in acasing and cannot be lifted except by inserting a key through the end ofthe casing. The casing may be made long enough to eXtend nearly to thelower rail of the window-sash, so that it would be necessary to raisethe window to open the blind. The key may also be used to hold the catchlocked by leaving it inserted in the end of the casing and then closingthe sash down upon it.

The advantages of my invention will fully appear hereinafter and byreference to the accompanying drawings, in which- Figure 1 is a view ofa fragment of window sill, sash, and blind, showing my latch in sectionand in a locked position; Fig. 2, a similar View showing the manner ofunlocking the blind, and Fig. 3 a cross-section of the device.

Referring to the drawings, in which similar reference charactersindicate corresponding parts throughout the several views, A representsa window-blind, B the window-sill, and C the sash.

D represents a casing having a fiange E, which is secured to the blind Aby screws or other suitable means. As shown in Fig. 3, casing D is madeU-shaped in cross-section and has pivoted therein a gravity-latch F,which when the blind is locked drops into notch H in sill B. Notch H maybe, as shown in the drawings, cut into the sill and have a plate I atthe outer end, or it may be formed of metal and adapted to be insertedin the sill. In either case it must be formed with a slanting bottomsurface J from the outer end upwardly toward the inner side of the sill.

K represents the looking and unlockng key, having one end formed withlug L. By inserting the key in the end of casing D, which is providedwith an opening M for that purpose, and sliding it down the slantingbottom J the lug L as soon as it has passed beyond the pivot of latch Gwill raise it by using the key as a lever and the end of notch H as afulcrum. When the blind is closed, the latch Gr may be held in a lockedposition by inserting key K so that lug L bears against the free end ofthe latch. The window-sash C may then be lowered on the key, and afterthe sash is closed the blind will be securely held and cannot beunlocked Without raising the sash.

Having thus described my invention, What I claim isl. In combinationwith a window sill and blind, a casing secured to the blind, a latchpivoted in said casing, a notch in the sill to receive said latch, andmeans to positively hold said latch in a locked position, substantiallyas shown and described.

2. In combination with a window sill and blind, a casing Secured to theblind, a latch pvoted in said casing, a notch in the sill having aslanting bottom and adapted to receive said latch, and a key having alug to lift said latch from said notch, and to positively hold it in alocked position, substantially as shown and described.

3. In combination with a window sill, sash and blind, a casing securedto the blind, a latch pivoted in said casing, anotch in the sill havinga slanting bottom and adapted to receive said latch, and a key having alug, said lug adapted to seat under the free end of said latch and thekey under the window sash when the blind is locked, and to slide downthe slanting bottom of said notch when lifting the latch, substantiallyas shown and described.

In testimony whereof I hereto affix my signature in the presence of twowitnesses.

WILIAM FRANKLIN STOUGH.

Witnesses:

O. H. COLLIER, DOUGLAS BOOTH.

